Valve Position Indicator Using Gear Conversion for Precise Feedback
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Solution Overview
Problem
Existing position indicators for valves, particularly manual rising stem gate or wedge valves, suffer from uncertainty in positioning, making them unsuitable for automated systems.
Innovation Solution
A device comprising a mechanical mechanism with a series of gears and a support member to affix it to the valve, coupled with an output device that provides a signal indicative of the valve's position, allowing for precise indication of the valve's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a linearly moving indicator is used to translate valve stem movement, then the indicator structure is simple, but the positioning precision deteriorates leading to uncertain positioning
Solution Approach 1:
The patent replaces the linear mechanical translation system with a rotary mechanical system using gears. The valve stem's linear motion is converted to rotary motion through a first gear that engages with a second gear, providing precise positional indication through rotational displacement rather than linear displacement.
Solution Approach 2:
The patent changes the motion parameter from linear displacement to angular displacement. By converting the linear movement of the valve stem into rotational movement through gear engagement, the system achieves more precise positioning measurement through angular parameters.
2Adaptability or versatility
If existing position indicators are used on manual rising stem valves, then no modification to the valve is needed, but the positioning uncertainty makes them unsuitable for automated systems
Solution Approach 1:
The patent introduces a rotary gear mechanism that replaces unreliable linear indication systems. The gear train converts linear valve stem motion into precise rotary motion, enabling reliable position feedback suitable for automated control systems while maintaining compatibility with existing manual valves.
Solution Approach 2:
The patent introduces an intermediary gear mechanism between the valve stem and the position indicator. This intermediary system converts the linear motion into rotary motion, providing reliable position information that bridges the gap between simple mechanical valves and automated control requirements.
3Measurement precision
If a gear mechanism is introduced to convert linear motion to rotary motion, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the position indication function into distinct modular components: a first gear engaged with the valve stem, a second gear for motion conversion, a third gear, and a fourth gear. This segmentation allows each component to perform a specific function while maintaining overall system manageability and precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device provides a precise and reliable indication of the valve's position, enabling accurate control and integration with automated systems without the need to replace or modify the existing valve or hand wheel.
Implementation Method 1
a first gear configured to operatively connect to the valve; a second gear coupled to a first end portion of a first support, wherein the second gear is sized and configured so as to mate with the first gear
Implementation Method 2
a third gear coupled to a second end portion of the first support; a fourth gear coupled to a first end portion of a second support, wherein the fourth gear mates with the third gear
Data Source
AI summary
A device for indicating the position of a valve including a mechanical mechanism and output device. A related method for indicating the position of a valve including operatively connecting the device to a valve such as a manual valve. A mechanical mechanism for use with a valve is also described herein. An output device for use with a valve is also described herein.